Results 91 to 100 of about 2,078 (215)
Journal of Volcanology and Geothermal Research, 2016 Tungurahua volcano, located in the central area of the Ecuadorian Sierra, is erupting intermittently since 1999 alternating between periods of quiescence and explosive activity. Volcanic ash has been the most frequent and widespread hazard provoking air contamination episodes and impacts on human health, animals and crops in the surrounding area. After
René Parra +6 more
openaire +4 more sources
Branched Conduit Structure Beneath the Active Craters of Sakurajima Volcano Inferred From Muography
Journal of Geophysical Research: Solid Earth, Volume 129, Issue 9, September 2024.Abstract Observing in‐conduit physical mechanism underlying the switching of eruptive activity between the craters of multi‐vent volcanoes could contribute to hazard assessment at these complex volcanic edifices. We performed monitoring of mass density changes beneath two active craters of Sakurajima volcano in Kyushu, Japan between September 2018 and ...
László Oláh +4 more
wiley +1 more source
Application of the Monopole Source to Quantify Explosive Flux During Vulcanian Explosions at Sakurajima Volcano (Japan) [PDF]
, 2014 A primary goal in volcano seismology is to characterize source motions internal to a volcano in terms of their representative forces. In a similar manner, much volcano infrasound research strives to recover eruptive force time histories corresponding to ...
Johnson, Jeffrey B., Miller, Alex J.C.
core +2 more sources
Time‐Resolved Trigger Processes Leading to the Plinian Eruptions at Sakurajima Volcano, Japan
Journal of Geophysical Research: Solid Earth, Volume 129, Issue 9, September 2024.Abstract Mafic magma recharge of crustal reservoirs and subsequent magma mixing has been considered a direct trigger of volcanic eruptions. However, although recharge frequently occurs in many active volcanoes, it rarely leads to an eruption immediately, making its role as a trigger ambiguous.
Naoki Araya +3 more
wiley +1 more source
Coupled subdaily and multiweek cycles during the lava dome erupt of Soufriere Hills Volcano, Montserrat [PDF]
, 2013 Observations of volcanoes extruding andesitic lava to produce lava domes often reveal cyclic behaviour. At Soufriere Hills Volcano, Montserrat, cycles with sub-daily and multi-week periods have been recognised on many occasions.
Costa, A. +3 more
core +1 more source
Journal of Geophysical Research: Solid Earth, Volume 129, Issue 8, August 2024.Abstract The 1999 basaltic eruption of Shishaldin volcano (Alaska) displayed a transition between Subplinian and Strombolian activity. Strombolian bubbles indicate the presence of a periodically unstable foam at the top of magma reservoir. In contrast, a long foam, whose rupture led to the eruptive column, was also able to collect in the conduit ...
S. Vergniolle
wiley +1 more source
Experimental Evidence of Primary Permeability at Very Low Gas Content in Crystal‐Rich Silicic Magma
Geophysical Research Letters, Volume 51, Issue 11, 16 June 2024.Abstract Eruptive dynamics is influenced by gas escape from the ascending magma. Gas pathways form in the magma via bubble coalescence, leading to gas channeling. Magmatic crystals play a key role in gas channel formation. This work constrains experimentally decompression‐induced coalescence in high‐crystallinity silicic magmas without external ...
Anna Theurel +5 more
wiley +1 more source
Subaqueous cryptodome eruption, hydrothermal activity and related seafloor morphologies on the andesitic North Su volcano [PDF]
, 2016 © The Author(s), 2016. This is the author's version of the work and is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Journal of Volcanology and Geothermal Research 323 (2016): 80-96, doi ...
Bach, Wolfgang +3 more
core +1 more source
Dipole Source to Model Ground Deformation Due To Magma Migration
Earth and Space Science, Volume 11, Issue 5, May 2024.Abstract Although magma migration is a necessary condition for the occurrence of a volcanic eruption, static analytical models for ground deformations consider stationary sources that undergo a change only in forces acting in the Earth's interior, such as changes in pressure or volume in a geometrically defined body.
Flavio Cannavó
wiley +1 more source
An analytical model for gas overpressure in slug-driven explosions:insights into Strombolian volcanic eruptions [PDF]
, 2012 Strombolian eruptions, common at basaltic volcanoes, are mildly explosive events that are driven by a large bubble of magmatic gas (a slug) rising up the conduit and bursting at the surface.
Del Bello, Elisabetta +4 more
core +1 more source